Clear and mild overnight, low 60

Skies stay clear and conditions stay mild overnight. A frontal system is stalled out down to our south ... which has kept the oppressive triple-digit heat out of our reach. Low temperatures tonight fall to 60 degrees, then we'll be back to our own heat wave tomorrow.

High temperatures are expected to hit 90 degrees in Springfield again on Sunday, which will officially put us down for a heat wave (defined as three consecutive 90+ degree days). Fortunately, the humidity will not be too bad, and the hilltowns are likely to stay in the mid-80s tomorrow.

However, another weak system coming through the region may provide enough of a spark for an isolated afternoon thunderstorm. Except for that, most of us will stay dry and enjoy partly cloudy skies for much of the day.

Heading toward the Fourth of July, we may be faced with some rain showers by Wednesday. The week will be back and forth ... chance of showers on Monday, partly cloudy and dry on Tuesday, then another chance of showers on Wednesday. Temperatures stay rather warm, as highs will be in the upper-80s through most of the week.